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Genetic inference of orchid population dynamics on different‐aged lava flows in Costa Rica
Volcán Arenal lava flows represent natural, non‐anthropogenic habitat disturbance that permit precise knowledge of when these sites became available for colonization. By examining the levels and spatial distribution of genetic variation of five Epidendrum radicans populations growing on lava flows deposited in 1968 and 1992, we were able to infer ...
Dorset W. Trapnell, James L. Hamrick
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Tertiary Igneous Rocks of the Pyrenees [PDF]
THE review of the treatise of Beyschlag, Vogt, and Krusch in NATURE of August 3, 1916, gives prominence to their mention of supposed absence of Tertiary igneous rocks. Yet even their pages figure grey-copper veins of Los Arcos cutting Tertiary beside ophite and granite intrusions.
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Igneous rock oil and gas reservoir has gradually become an important type of oil and gas reservoir, but the igneous rock reservoir is highly heterogeneous, the reservoir property varies greatly, and the study of reservoir genetic mechanism is ...
Xiang XIA+3 more
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Relationship between Brittleness Index and Crack Initiation Stress Ratio for Different Rock Types
Brittleness and crack initiation stress (σci) are important rock mechanical properties and intrinsically related to rock deformation and failure. We establish the relationship between σci and uniaxial tensile strength (σt) based on the Griffith stress ...
Juyu Jiang+3 more
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On the igneous rocks of the Welsh Border [PDF]
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In the Es3 formation (third section of the Shahejie) of the Eastern sag section of the Liaohe Depression, basalt and trachyte are predominant in the igneous rock. The reservoir consists of complex reservoir space types.
Zongli Liu+4 more
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Caldera of Godean, Sleman, Yogyakarta: A Volcanic Geomorphology Review
Godean hills is located approximately 10 km westward from the Yogyakarta City. The landscape of Godean hills and plains is affected by various factors, such as lithology, geological structure, and sub-aerial process.
Hill Gendoet Hartono+2 more
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Igneous rocks of Teviot and Liddesdale [PDF]
Introduction. The district dealt with in the following pages forms a belt of country about fifteen miles in width. It extends from Roxburgh and Melrose in a south-easterly direction as far as Langholm and Canonbie Moor, and is included in Sheets 25, 17 and 11 of the Geological Survey's one-inch to a mile map of Scotland.
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We evaluated the patterns of elk‐vehicle collisions in the Central Canadian Rocky Mountains to reveal population‐level impacts and inform mitigation solutions. We found that more females and adults are involved in collisions, but when compared to the sex and age of the elk population, males and subadults are more prone to collisions in the fall.
Kari Elizabeth Gunson+2 more
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Tectonic control on dyke and sill intrusions of active tectonic margine, case study in Cilacap area, Central Java Indonesia [PDF]
Control of geological structures on the presence of dyke and sill intrusions in the Cilacap-Central Java area requires explanation. The research was conducted through a series of fieldwork. Field research is carried out by measuring geological structural
Widagdo Asmoro+5 more
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